Unit circuit, method of controlling unit circuit, electronic device, and electronic apparatus

A method of controlling a unit circuit that includes a capacitive element having a first electrode, a second electrode, and a dielectric layer interposed between the first electrode and the second electrode, a transistor having a gate electrode coupled to the first electrode;

• a first switching element that controls an electrical connection between the first electrode and a predetermined electric potential;
• and a second switching element connected to the second electrode, the method comprising:
• setting an electric potential of the first electrode to the predetermined electric potential by turning on the first switching element;
• setting the electric potential of the first electrode to a first electric potential by supplying a first operation signal to the second electrode through the second switching element during at least part of a period in which the second transistor is in an ON-state, the supplying of the first operation signal to the second electrode being carried out during at least a part of a period in which the first electrode is electrically disconnected from the predetermined electric potential by turning off the first switching element;
• turning on the first switching element after a period during which the electric potential of the first electrode is set to the first electric potential is completed, and supplying a second operation signal to the second electrode through the second switching element during at least part of a period in which the second transistor is in an ON-state, the supplying of the second operation signal to the second electrode being carried out during at least a part of a period in which the electrical potential of the first electrode is set to the predetermined potential;
• and
• setting the electric potential of the first electrode to a second electric potential by supplying a third operation signal to the second electrode through the second switching element during at least part of a period in which the second transistor is in an ON-state, and the supplying of the third operation signal to the second electrode being carried out during at least a part of a period in which the first electrode is electrically disconnected from the predetermined electric potential by turning off the first switching element,
• a polarity of a voltage level of the first electric potential being opposite to a polarity of a voltage level of the second electric potential when the predetermined electric potential is used as a reference potential.

An electronic device, comprising:

• a plurality of first signal lines;
• a plurality of second signal lines;
• a plurality of power supply lines;
• and
• a plurality of unit circuits,
• each of the plurality of unit circuits including:
• a capacitive element having a first electrode, a second electrode, and a dielectric layer interposed between the first and second electrodes;
• a transistor having a gate electrode connected to the first electrode;
• a first switching element that controls an electrical connection between the first electrode and one of the plurality of power supply lines;
• and
• a second switching element connected to the second electrode,
• an electric potential of the first electrode is set to a first electric potential by supplying a first operation signal to the second electrode through the second switching element during at least part of a period in which the second switching element is in an ON-state, the supplying of the first operation signal to the second electrode being carried out after the first electrode is electrically connected to one power line of the power supply lines by turning on the first switching element, and the supplying of the first operation signal to the second electrode being carried out during at least a part of a period in which the first electrode is electrically disconnected from the one power supply line,
• after a first step during which the electrical potential of the first electrode is set to the first electrical potential is completed, a second step during which the first electrode is electrically connected to the one power supply line by turning on the first switching element while a second operation signal is supplied to the second electrode through the second switching element during at least part of a period in which the second switching element is in an ON-state being carried out, and
• the electric potential of the first electrode is set to a second electric potential by supplying a third operation signal to the second electrode through the second switching element during at least part of a period in which the second switching element is in an ON-state, the supplying of the third operation signal to the second electrode being carried out after the second period is completed, and the supplying of the third operation signal to the second electrode being carried out during at least a part of a period in which the first electrode is electrically disconnected from the one power supply line by turning off the first switching element.